102 BOTANY. caducous: pods shortly stipitate, 5-7-jointed; joints triangular-rounded, nearly smooth and glabrous, IJ to 2J lines long.—Southeastern Arizona, previously collected only by Mr. Wright in the valley of the San Pedro; at Rocky Canon, Camp Grant, and Chiricahua Agency, Rothrock (290, 366, 531). It seems to differ only in its smoother pods "from D. Sonorce, Gray, I. c, which is referred by Bentham to D. uncinatum, DC, of Mexico and southward. The latter has usually much larger, conspicuous bracts, broader leaves, and more densely tenacious-pubescent pods. ViciA Ameeicana, Muhl, var. lineaeis, Watson (Proc. Am. Acad, xi, 134). (Lafhyrus linearis, Nutt.)—Leaflets linear.—A very common western form; San Francisco Mountains, 1872, and at Willow Spring, Ariz., Rothrock (224 in part), also at Denver, Colo., Wolf (185). Speci¬ mens of nearly the typical form were collected near Denver, Wolf (186), and in Nevada and Utah, 1871 and 1872. Vicia pulchella, H. B. K. (Nov. Gen. vi, 499, t. 583).—TaU and very slender, sparingly silky-pubescent: leaflets linear, obtuse or acute, mucronate, a half to an inch long; stipules narrow: flowers small, numer¬ ous ) usually crowded in long-peduncled racemes, equalling the leaves, pale purple or ochroleucous, 2 or 3 hues long, reflexed: pods linear-oblong, an inch long, nearly sessile, puberulent, 6-8-seeded.—From Western Texas to Arizona and southward; Mount Graham, and Willow Spring, Ariz:, Roth¬ rock (211, 434, 1006, lOOy). Lathyeus palustee, Linn.—The prevalent form has the leaves very narrowly linear.—CoUected in Utah in 1872, at Clear Creek, Colo., Wolf (187), at Big Dry Fork, Ariz., Loew (204), at Rocky Canon and WiUow Spring, Ariz., Rothrock (286, 224 in part), and also at Fort Wingate, N. Mex., Rothrock (142).—The broader-leaved var. myetifolius. Gray, appears to have been collected in the Wahsatch in 1872, referred in the' pubhshed hst to L. venosus. Lathyeus polymoephus, Nutt. (Gen. ii, 96).—Perennial, erect, a foot or two high, stout and scarcely climbing, finely pubescent or glabrous,glaucous: leaflets 3 to 6 pairs, thick and strongly nerved, narrowly oblong,acute at each end, an inch or two long; stipules narrow, acuminate:peduncles equalling the leaves, 2-6-flowered: flowers purple, very large, 9